{"id":"CVE-2026-116538","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-116538","generatedAt":"2026-10-28T06:35:46.471Z","title":"HtmlSanitizer before 9.2.1039 and 10.0 prereleases before 10.0.1037-beta contains a cross-site scripting vulnerability because SanitizeDom(string) never sanitizes attributes on the html and body wrapper elements.","description":"HtmlSanitizer before 9.2.1039 and 10.0 prereleases before 10.0.1037-beta contains a cross-site scripting vulnerability because SanitizeDom(string) never sanitizes attributes on the html and body wrapper elements. Attackers can supply input with a second body or html tag carrying event handlers like onload, executing script when applications render serialized document or body outer HTML.","published":"2026-10-26T16:17:19.000Z","lastModified":"2026-10-26T18:39:43.000Z","status":"Awaiting Analysis","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":2.3,"severity":"LOW","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00287,"percentile":0.21162,"date":"2026-10-27","history":[{"date":"2026-10-27","score":0.00287,"percentile":0.21162}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T16:17:19.000Z","detail":{"score":"2.3","severity":"LOW","publishedAt":"2026-10-26T16:17:19.030Z"},"summary":"New CVE, low severity (CVSS 2.3)."}],"references":[{"url":"https://github.com/mganss/HtmlSanitizer","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/blob/v9.2.995/src/HtmlSanitizer/HtmlSanitizer.cs#L456-L465","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/blob/v9.2.995/src/HtmlSanitizer/HtmlSanitizer.cs#L555-L583","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/commit/96afbc818e64de7571ea17954a05d523e819c56f","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/commit/ab626e7a4f2893f7e9ec0a72779ae19c5ec439a7","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/releases/tag/v10.0.1037-beta","source":"disclosure@vulncheck.com"},{"url":"https://github.com/mganss/HtmlSanitizer/releases/tag/v9.2.1039","source":"disclosure@vulncheck.com"},{"url":"https://joshua.hu/htmlsanitizer-sanitizedom-body-html-attribute-bypass","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/htmlsanitizer-before-9.2.1039-xss-via-sanitizedom-body-and-html-attributes","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116538","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}